TY  - BOOK
AU  - Bernfeld Stephen R
AU  -  Lakshmikanatham V
TI  - Introduction to nonlinear boundary value problems
T2  - Mathematics in Science and engineering; 109
U1  - B331, L4 
PY  - 1974///
CY  - New York    
PB  -  Academic Press       
KW  -  Nonlinear theorie s
KW  - Boundary value problem
ER  -